iosr-Jm   Volume-19 ~ Issue-6 ~ Nov. – Dec. 2023

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Abstract : In the present paper we investigated the heat and mass transfer in the MHD micropolar Jeffery fluid flow over stretching sheet in the presence of porous medium. By using suitable similarity transformations, we get non-linear ordinary differential equations with the help of governing partial differential equations. We used DTM method for finding the analytical solution from the nonlinear ordinary differential equations. Obtained DTM solution is explored by bvp4c numerical solver built in MATLAB and effect of porosity parameter, Deborah number, magnetic field parameter, Jeffery fluid parameter etc. on velocity profile, temperature distribution, microrotation and concentration profile are explained by graphs. It is found that that as porosity parameter increases velocity decreases while increases in Prandtl number decreases the temperature profile distributions.

Key words: Micropolar fluid, Jeffery Fluid, MHD, Thermal Radiation, Porous Medium, Heat Transfer, Mass Transfer.

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Abstract : This analysis explores the consequences of flow and heat transfer by the process of free convection inside a triangular cavity, which contains heat source/sink at the bottom wall. The entire cavity has been filled with Al2O3 -Cu water based hybrid nanofluid. Finite element method has been applied for descretization the governing equations of the present problem numerically. A fixed Prandtl number (Pr = 0.71) has been used for the numerical solution. The impact of relevant parameters such as Rayleigh number(Ra), heat generation(Q), Hartmann number...

Key Word: Triangular Cavity, Nusselt Number, Hybrid Nanofluid, Rayleigh Number.

[1]. Rashad AM, Chamkha AJ, Ismael MA, Salah Taha. MHD natural convection in a triangular cavity filled with a Cu-Al2O3/water hybrid nanofluid with localized heating from below and internal heat generation. J. of Heat Transfer. 2018, pp. 1-23 (doi:10.1115/1.4039213).
[2]. Dogonchi AS , Ismael MA and Chamkha AJ. Numerical analysis of natural convection of Cu- water nanofluid filling triangular cavity with semicircular bottom wall. J Therm Anal calorim . 2019; 135, 3485-3497.
[3]. Mahmoudi A, Pop I and Shahi M . Effect of magnetic field on natural convection in a triangular enclosure filled with nanofluid. Int. J. Therm. Sci. 2012, 59, 126–140.
[4]. Chamkha and Ismael . Magnetic field effect on mixed convection in LID-driven trapezoidal cavities filled with a Copper–Water nanofluid with an aiding or opposing side wall. J Thermal Sci .Engg. App. 2016, 8, pp-031009 - 1 .
[5]. Angirasa D. Analysis of hybrid nanofluid behavior in a triangular cavity along with heat source consideringthe effect of Magnetic force. Fluid Dynamics Research . 2000, vol.26. pp.219-233

Abstract : MOOCs have great impact in education for the different stakeholders as they offer an opportunity to learners to enhance their higher education and the faculty to hone their competence and professional development. Although there exist vast literature relating to the benefits of using MOOCs among the learners and the faculty in mathematics, there is paucity of information focusing on the Middle East. The purpose of this qualitative descriptive study was exploration of the use of MOOCs for the professional development and training of mathematics faculty at higher...

Key Word: MOOCs, Mathematics Faculty, Technology, Self-efficacy, STEM

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